本人是个菜鸟 请高手指点Session的问题!
我从别的地方抄来一段。NET的   登陆代码! 
 一直搞不清楚   Session覆值在着段代码什么地方写,如何写?   请各位高手指点,   谢谢!   
                                                                                  string   userName=Request.Form[ "userName "].ToString(); 
 			string   userPwd=Request.Form.Get( "userPwd ").ToString();  			 
 			SqlConnection   con=new   SqlConnection( "server=.;database=login;uid=sa;pwd=; "); 
 			con.Open(); 
 			SqlCommand   cmd=new   SqlCommand( "select   count(*)   from   login   where   userName= ' "+userName+ " '   and   userPwd= ' "+userPwd+ " ' ",con); 
 			int   count=Convert.ToInt32(cmd.ExecuteScalar()); 
 			if(count> 0) 
 			{ 
 				Response.Redirect( "index_admin.aspx "); 
 			} 
 			else 
 			{ 
 				Response.Redirect( "sb.htm "); 
 			}
------解决方案--------------------string userName=Request.Form[ "userName "].ToString(); 
 			string userPwd=Request.Form.Get( "userPwd ").ToString();  			 
 			SqlConnection con=new SqlConnection( "server=.;database=login;uid=sa;pwd=; "); 
 			con.Open(); 
 			SqlCommand cmd=new SqlCommand( "select count(*) from login where userName= ' "+userName+ " ' and userPwd= ' "+userPwd+ " ' ",con); 
 			int count=Convert.ToInt32(cmd.ExecuteScalar()); 
 			if(count> 0) 
 			{ 
                                  ///在这里写,用户已经可以登录了,就要记录session了,然后再跳转页面 
                                      Session[ "User_ID "] =  "XXX "; 
 				Response.Redirect( "index_admin.aspx "); 
 			} 
 			else 
 			{ 
 				Response.Redirect( "sb.htm "); 
 			} 
------解决方案--------------------同意楼上
------解决方案--------------------copico(名字再长也不会引起各位坛友的高度重视和深刻考虑) 
 这位大哥说的对
------解决方案--------------------if(count> 0) 
 			{ 
 				Response.Redirect( "index_admin.aspx "); 
 			}